package com.canal.display.annotation;

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Target;

/**
 * 为空检验 标注参数、属性、方法可为 Null
 * @author yangbo
 * @date 2019-06-18 9:17
 */
@Target({ElementType.PARAMETER, ElementType.FIELD, ElementType.METHOD})
@Documented
public @interface Nullable {
}
